IDEA #1JU125 Soft Magnetic Amorphous And Nanocrystalline Alloys For Industry

SOFT MAGNETIC AMORPHOUS AND NANOCRYSTALLINE ALLOYS FOR INDUSTRY APPLIED RESEARCH • METALSRESEARCH • Electron(cid:2)optical information display and monitoring systems with minimum overall dimensions (high level of temperature stability and mechanical strength of cores are important). Stage ooff Development Functioning prototypes of necessary technological equipment were designed and manufactured by IMP of NAS of Ukraine and by MELTA Ltd. Design documentation has been prepared for manufacture of equipment with annual output about 20 ton amorphous ribbons. Methods have been developed and equipment has been designed for manufacture of toroidal, rod and C(cid:2)shaped tape wound cores, their heat and heat(cid:2)magnet(cid:2) ic treatment, encapsulation or overall polymeric coat; func(cid:2) tioning prototypes of this equipment were manufactured. (FeSiB)96,6(CuNb)3,4–(MM(cid:2)1N) New six grades of amorphous and nanocrystalline alloys have been developed and are now produced. In particular, nanocrystalline and (FeSiB)96(CuNb)4 – (MM(cid:2)11N) alloys showed themselves well and their small volumes are manufactured at the research–and(cid:2)production company – MELTA Ltd. Beginning from 2000 the company produces annually about 1 ton of magnetic cores of various purpose as well as mass and over(cid:2) all dimensions. Description (transformer steel, permalloys) and Soft magnetic amorphous and nanocrystalline alloys in a num(cid:2) ber of applications (power pulse medium frequency transform(cid:2) ers, current measuring transformers, electric motors, protective reactors, phase shift correctors, chokes etc.) already success(cid:2) fully substitute conventional crystalline rolled soft magnetic materials ferrites. Realization of innovation developments of the G.V. Kurdyumov Institute for Metal Physics of the N.A.S. of Ukraine and the MELTA Ltd in the field of high(cid:2)productivity technology of rapid (up to 106 K/s) quenching of melts (RQM) enables obtaining the materials with the unique magnetic, mechanical and chemical properties, particularly ribbons of amorphous alloys, which thickness doesn’t exceed 30(cid:2)50 μm. The Planar Flow Casting (PFC) method lies in the RQM technology as the well(cid:2)known main component of nanotechnologies in metallurgical (micrometallurgy) and electrical industries. Innovative Aspect and Main Advantages Produced encapsulated amorphous and nanocrystalline tape wound cores made of new alloys and technology of their manu(cid:2) facture ensure high heat(cid:2)time stability of their initial magnetic permeability and other magnetic characteristics. The high com(cid:2) petitive ability of products caused by combination of high mag(cid:2) netic characteristics, thermal stability, mechanical strength, cer(cid:2) tain price attraction due to relatively low cost of production. New amorphous and nanocrystalline cores with high heat(cid:2)conduct(cid:2) ing outer insulation can work for long periods at the tempera(cid:2) tures up to 1800C and frequencies 0.05 (cid:2) 5MHz and are charac(cid:2) terized by: initial magnetic permeability (at 100 kHz) 25000; permeability drop at exposure 1300C for 2000 hrs 20%. V I V I Areas ooff Application Fig.1. Amorphous ribbon production process and magnetic cores made of it. In electronics, electrical engineering, aircraft industry. The existing market requirements are today estimated at sev(cid:2) eral hundreds of millions of small(cid:2)sized (weighing from 0.1 to 3g) magnetic cores per year and demand for such products is redoubled each year in the world. Examples of application and manufacture are as follows: • High grade compact electromagnetic noise filters (CMC) (high magnetic permeability at frequencies >100 kHz is important). • Matching small(cid:2)size HF transformers (high values of satu(cid:2) ration induction and initial permeability allow minimizing dimensions of transformers and added distortions of trans(cid:2) formed or transmitted signals. • Chokes of differential filters of small dimensions (high Bs in combination with maximum low core losses at high timing frequencies and elevated temperatures, 140оС, is important). Contact details Contact person: Valery V. Maslov, professor, D.Sc. Developer: G.V.Kurdyumov Institute for Metal Physics, N.A.S. of Ukraine Address: 36 Acad. Vernadsky Blvd., 03142 Kyiv, Ukraine Phone/fax: +(380 44) 424 25 61, E(cid:2)mail: maslov@imp.kiev.ua http://www.imp.kiev.ua Producer: MELTA Ltd. Viktor K. Nosenko, D.Sc. Address: 36 Acad. Vernadsky Blvd., 03142 Kyiv, Ukraine Phone/fax: +(380 44) 424 35 05, E(cid:2)mail: melta@imp.kiev.ua http://www.noviteh.com http://www.partnershipsforprosperity.net/ua/melta.html INNOVATIVETECHNOLOGY OPPORTUNITIES FROM THE STCU 13